Display Panel Lens Arrays with Position-Specific Light Extraction
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Solution Overview
Problem
Conventional display devices face challenges in securing an emission area for image display and improving luminance.
Innovation Solution
A display panel design that includes a substrate with a light-emitting structure, a color filter layer, and a lens array, where the lenses and color filters have varying shapes corresponding to different pixels to enhance light output efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional display devices use uniform lens shapes, then manufacturing is simpler, but light output efficiency and luminance are insufficient
Solution Approach 1:
The patent applies local quality by varying lens shapes according to their specific positions on the display panel. Lenses near the non-display area use asymmetrical shapes optimized for light extraction, while lenses in the display area use symmetrical shapes. This position-dependent differentiation resolves the contradiction by optimizing light output efficiency locally without requiring complete redesign of all lenses.
Solution Approach 2:
The patent introduces asymmetry in lens design for specific regions. Asymmetrical lenses are used near the non-display area to improve light extraction efficiency by directing light at various angles. This selective application of asymmetry enhances overall light output while maintaining manufacturing feasibility through standardized symmetrical lenses for other areas.
2Productivity
If asymmetrical lenses are used near the non-display area, then light extraction efficiency is improved, but device complexity increases
Solution Approach 1:
The patent limits the application of complex asymmetrical lens designs to only the necessary regions near the non-display area. The majority of the display area uses simpler symmetrical lenses, thereby containing device complexity while achieving improved light extraction where it is most needed.
Solution Approach 2:
The lens array is segmented into different regions with different lens types. By dividing the display panel into areas requiring asymmetrical lenses (near non-display area) and areas suitable for symmetrical lenses (display area), the patent manages device complexity through regional segmentation rather than uniform complexity across the entire array.
3Productivity
If lenses have varying shapes for different pixels, then light is concentrated more effectively, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies varying lens shapes only in specific local regions where light concentration is most beneficial, rather than across the entire display panel. This localized approach maintains manufacturing precision requirements for the majority of uniform lenses while achieving enhanced light concentration where needed.
Solution Approach 2:
The patent extracts the complex varying shape requirement from the entire lens array and applies it only to specific regions. By separating the lens array into uniform and varied regions, the patent reduces overall manufacturing precision requirements while maintaining light concentration efficiency in critical areas.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design increases light output efficiency and improves visibility by concentrating light through lenses with asymmetrical shapes, particularly near the non-display area, enhancing the overall performance of the display device.
Implementation Method 1
a lens array above the color filter layer, and including lenses for outputting the light passing through the color filter layer to an intended path
Implementation Method 2
a color filter layer above the light-emitting structure, and configured to filter and selectively output the light emitted from the light-emitting structure
Data Source
AI summary
According to one or more embodiments of the disclosure, a display panel includes a substrate including an area corresponding to a location of pixels, a light-emitting structure above the substrate for emitting light in a direction substantially perpendicular to the substrate, a color filter layer above the light-emitting structure, and configured to filter and selectively output the light emitted from the light-emitting structure, and a lens array above the color filter layer, and including lenses for outputting the light passing through the color filter layer to an intended path, the lenses having different respective shapes corresponding to different ones of the pixels.